Powerline networking - any good?

I currently use a wireless router for my broadband connection (just one computer with an adapter). But it has never been 100% reliable, and my wife worries about the radio frequency waves in the house.

I'm wondering whether a powerline network is the way to go. Does anyone use this system?

If so, please could you give me your views on its effectiveness, cost and safety? Do you have any problems with noise on the circuit, or is this effectively filtered out?

I don't imagine that speed is going to be a problem, as my BB connection is only 2 meg.

As I already have a wireless router/BB modem unit (Belkin) my plan was to run an ethernet cable from the router to one powerline unit, then ditto from the second powerline unit to the computer's ethernet card.

But do you happen to know whether this would automatically disable the wireless function on the router (which is what I want to do)?

the electricity supply in this country is 3-phase in effect 3 separate supplies. Every 3rd house is connected to the same phase normally. Therefore every 3rd house will be able to get the signal if they have the same units. The distance involved is the area supplied by the mains transformer that your supply comes from. This could be 2 or 3 streets in town or a couple of miles in outlying areas.